In the early days of horizontal remediation wells, the estimated costs made many projects completely unfeasible. However, with the advance of technology in directional drilling and innovative solutions within the environmental industry, this technology is becoming affordable and practical.
Like most environmental projects, the cost of a Horizontal Remediation Well will depend on the size and scope of the project. Outlined below are three hypothetical, but yet typical horizontal well projects.
A typical small Horizontal Remediation Well project
A hypothetical dry cleaner sitting on a quarter acre lot.
Contamination and Objective: Removal of separate phase hydrocarbon, remediation of dissolved hydrocarbons and control/prevent offsite migration
Number of horizontal wells: Two 2” PVC Soil Vapor Extraction Wells
Horizontal Well depth: 7 feet below ground surface
Horizontal Well length: 70 feet
Screen Design: Well designed at 3.5 inches of mercury
Lump Sum well installation estimated costs: $25,000 to $35,000
A typical medium Horizontal Remediation Well project
Hypothetical gas station project, < 1 acre in size
Contamination and Objective: Prevent offsite migration of separate and dissolved phase hydrocarbons, recovery of separate phase and remediation of dissolved hydrocarbons
Number of horizontal wells: Three 3” fiberglass wells
Horizontal Well depth: 10 feet and 22 feet
Horizontal Well length: 250 feet each
Screen Design: Two Air Sparge operating at 1 scm per foot and One Soil Vapor operating at 2 sfm per foot.
Lump Sum well installation estimated costs: $150,000 to $200,000
A typical large Horizontal Remediation Well project
Hypothetical manufacturing facility approximately 10-acre size property
Contamination and Objective: Removal of separate phase hydrocarbons, prevention of off-site migration and remediation dissolved hydrocarbon
Number of wells: 12 wells
Horizontal Well depth: 15 to 30 feet in depth
Horizontal Well length: Each well averages 500 feet in length
Screen Design: Eight Air Sparge operating at 1 scm per foot and Four Soil Vapor operating at 2 sfm per foot.
Lump Sum well installation estimated costs: 900,000 to 1,200,000
